JP2000089692A - Plasma display panel, plasma display module and its drive method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plasma display panel, a plasma display module and its drive method eliminating a casing and a filter for suppressing an electromagnetic wave caused from a PDP itself and inexpensively manufacturing a whole PDP device even while effectively reducing the radiation level of the electromagnetic wave. SOLUTION: This plasma display panel is provided with a front glass substrate 2 and a rear glass substrate opposite to each other, plural scan electrodes and common electrodes 4 arranged on the front glass substrate 2 in the row direction, plural data electrodes 5 arranged on the rear glass substrate 3 in the columnar direction and display cells arranged on respective crossing parts between the scan electrodes and common electrodes 4 and the data electrodes 5, and is constituted so as to perform a write-in discharge of the data to the display cells and to light emit the display cells. In this plasma display panel 1, a ground electrode 6 is provided on the rear glass substrate 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (hereinafter, also referred to as a PDP), a plasma display module and a method of driving the same, and more particularly, a common electrode and a scanning electrode are formed on the same surface and between both electrodes. The present invention relates to a surface discharge type plasma display panel that generates a surface discharge, a plasma display module, and a driving method thereof.

[0002]

2. Description of the Related Art In general, a PDP has many features such as a thin structure, no flicker, a large display contrast ratio, a relatively large area is relatively easy, and a high response speed. ing. For this reason, in recent years, it has been used as a flat display as a display output of a personal computer, a workstation, a wall-mounted television, or the like.

[0003] Depending on the operation method, the PDP has a DC discharge type (DC type) in which electrodes are exposed to a discharge space (discharge gas) and operates in a DC discharge state, and a PDP has electrodes covered with a dielectric material to form a discharge gas. Are classified as an AC discharge type (AC type) which operates in an AC discharge state without being directly exposed. The AC discharge type used for a wall-mounted television or the like includes a memory operation type in which a display cell itself has a memory function by a charge storage effect of a dielectric depending on a structure of discharging through a dielectric, and a refresh operation type which does not use this. The brightness of the PDP is proportional to the number of discharges, that is, the number of repetitions of the pulse voltage.

Here, a configuration example of a general plasma display panel will be described. Japanese Patent Application Laid-Open No. 8-55581 (first
Of the related art) describes a conventional color PDP. FIG. 15 is a sectional view showing a main part of the color PDP described in this publication. On the front side of the color PDP 41, a front glass plate 42 and an optical filter 43 for absorbing visible light in a certain range of the front glass plate 42 to improve contrast.
And a light / electromagnetic wave absorption layer 44 for absorbing unnecessary radiation electromagnetic waves.

FIG. 16 shows a cross section of a main part of a color PDP described in JP-A-9-145918 (second conventional example) and JP-A-9-149346 (third conventional example). Color PD
P51 has a filter 52 including an electromagnetic shielding layer on the front surface, leads out the extraction end 52a of the electromagnetic shielding layer in the filter 52 to the rear side of the filter 52, and attaches the extraction end 52a to the front surface of the housing via the mounting boss 58. The draw-out end 52a is attached to the portion 53 so that the mounting bracket 57 is in contact with the draw-out end 52a. A plurality of mounting bosses 58 are provided on the inner surface of the housing rear portion 54 so as to protrude toward the filter 52 and come into contact with the filter 52. The color PDP 51 includes a mounting bracket 57, a mounting boss 55 having a surface subjected to a conductive process, an inner surface of a housing front portion 53,
It is connected to the inner surface of the rear portion 54 of the housing and to the ground on the rear surface via the mounting boss 58.

FIG. 17 shows a color PDP described in Japanese Patent Application Laid-Open No. 9-172267 (fifth conventional example). FIG.
FIG. 17A is a perspective view showing the entire PDP, and FIG.
FIG. 2 is a cross-sectional view showing a half of a cross-sectional view taken along a plane C in FIG. The PDP module is a color PD
A frame 61 made of a conductor such as an aluminum alloy for accommodating the P60 and the drive circuit is provided.
A rear cover 63 made of plastic or the like is fixed to the rear side of the DP 60 (the lower side in the figure) by using screws 63 </ b> A provided in the frame body 61 with screws 65. Similarly, a front cover 62 made of plastic or the like is also provided on the front side (upper side in the figure) of the PDP 60 in the frame body 61 with a nut 64 using a boss 62A provided inside.
It is fixed to. Thereby, substantially the entire area inside the front cover 62 is covered by the frame 61 made of a conductor, and a shielding effect is exerted.

FIG. 18 shows a color PDP described in JP-A-9-306366 (sixth conventional example). A filter 70 is provided on the front of the color PDP. Filter 70
Are an external light anti-reflection film 74, a filter base 71 in which a pigment for selective absorption is mixed in a synthetic resin, and silver which is adhered to the filter base 71 and silver and an inorganic oxide are sputtered on a PET film or the like. A sputtered film 72,
And an AN film 75 for preventing Newton's ring, and shields electromagnetic waves from leaking from the color PDP.
Further, the silver sputtered film 72 is connected to the ground via a metal fitting (not shown) that comes into contact with the ground electrode 73 provided on the peripheral portion, and releases the voltage induced by the electromagnetic wave to the ground.

[0008]

In the first conventional example, the optical filter 43 having electromagnetic shielding characteristics is provided on the front glass plate 4.
2, the electromagnetic wave radiated in the rear direction of the color PDP 41 (upward in FIG. 15) is not treated at all, and when viewed as a whole color PDP 41, Sufficient electromagnetic shielding performance has not been obtained. Also in the sixth conventional example, for the same reason, the filter 70 alone cannot sufficiently suppress the electromagnetic waves generated from the color PDP.

In the third and fourth conventional examples, a filter 52 including an electromagnetic shielding layer, a housing front 53, and a housing rear 5
The electromagnetic wave generated by the color PDP 51 is shielded by enclosing the color PDP 51 with a closed curved surface composed of the color PDP 51. However, the filter 52 and the housing front 5
If the electrical contact between the third member 3 and the housing rear part 54 is insufficient, sufficient electromagnetic wave leakage suppression performance cannot be obtained. Even if the electrical contact is sufficient, the color PDP
If the level of the electromagnetic wave generated at 51 is high, the level of the leaked electromagnetic wave will also be high, and it will not be possible to obtain a sufficient electromagnetic wave leakage suppression performance. Further, in the fifth conventional example, since the frame 61 has an opening, electromagnetic waves may leak through the opening.

[0010] In each of the above-mentioned prior arts, an attempt is made to suppress the leakage of the electromagnetic waves generated in the color PDP by enclosing them in a closed space formed by an electromagnetic shield composed of a housing and a filter disposed outside. As described above, according to the method of suppressing the electromagnetic waves depending on the electromagnetic shielding, it is necessary to manufacture the housing, the filter, and the like with high accuracy, so that the price is likely to increase. In addition, there is a problem that the electromagnetic shielding performance is not sufficient, or even if the electromagnetic shielding performance is good, when the radiation level of the electromagnetic wave from the color PDP is high, the leakage electromagnetic wave cannot be suppressed to a desired level or less.

In the above-mentioned electromagnetic shielding measures, since the radiant energy inside does not become small, even if the electromagnetic shielding performance of the housing or the filter is weakened, electromagnetic leakage from other relatively weak performances may occur. It will be repeated, and measures to strengthen the shielding will be taken.
For this reason, by the time sufficient radiation suppression is finally achieved,
A lot of time and complicated manufacturing steps are required.

In view of the above, the present invention eliminates the need for a housing or filter for suppressing the electromagnetic waves generated from the PDP itself while effectively reducing the radiation level of the electromagnetic waves.
It is an object of the present invention to provide a plasma display panel, a plasma display module, and a method for driving the plasma display panel, which can manufacture the entire PDP device at low cost.

[0013]

In order to achieve the above object, a plasma display panel according to the present invention is provided with first and second substrates facing each other and arranged in a row direction on the first substrate. A plurality of scan electrodes and a common electrode; a plurality of data electrodes arranged in a column direction on the second substrate; and a display cell arranged at each intersection of the scan electrode and the common electrode and the data electrode. Wherein a ground electrode is provided on the second substrate in a plasma display panel for performing a write discharge of data in a display cell to emit light in the display cell.

Usually, in a plasma display panel,
The highest level of electromagnetic wave radiation occurs at the time of data writing. This phenomenon is caused by the fact that a high-frequency current, which causes radiation, flows through the data electrode at the time of data writing. In the plasma display panel according to the present invention, the high-frequency current flowing through the data electrode during data writing can be suppressed by the ground electrode provided on the second substrate. Therefore, even if there is no electromagnetic shielding performance by the case, filter, etc.,
The radiation level of electromagnetic waves can be effectively reduced.

Here, the plurality of data electrodes are connected to the second data electrodes.
It is preferable that the ground electrode is formed on a surface of the substrate facing the first substrate, and the ground electrode is formed on the entire surface of the second substrate opposite to the surface on which the data electrodes are formed. In this case, an image current in a direction opposite to the direction of the high-frequency current flowing through the data electrode is generated on the ground electrode by a mirror image effect. The electromagnetic wave generated from this image current has an inverted phase with respect to the electromagnetic wave generated from the high-frequency current on the data electrode, and acts to cancel the electromagnetic wave due to the high-frequency current. Can be.

Alternatively, instead of the above, the plurality of data electrodes are formed on a surface of the second substrate facing the first substrate, and the ground electrode is formed on a surface of the second substrate on which the data electrodes are formed. It is also a preferable embodiment that a plurality of band-shaped ground electrodes are formed on the opposite surface in parallel with the data electrodes. In this case, the image current induced in each band-shaped ground electrode flows parallel to and in the opposite direction to the high-frequency current flowing through the data electrode, and acts to cancel the electromagnetic wave due to the high-frequency current. be able to.

More preferably, the plurality of strip-shaped ground electrodes are formed inside the second substrate. Accordingly, the band-shaped ground electrode can be brought close to the data electrode, so that the amount of suppression of electromagnetic wave radiation from the current flowing through the data electrode can be increased.

It is preferable that the ground electrode has the same composition as the data electrode, the scan electrode, or the common electrode. Alternatively, it is preferable that the ground electrode is formed of a conductive sheet including a copper foil.
In these cases, good conductivity of the ground electrode can be maintained.

According to the plasma display module of the present invention, display cells are arranged in a matrix at each intersection of a plurality of row electrodes and a plurality of column electrodes provided between substrates facing each other. A plasma display panel that emits light by performing a write discharge of an electrode, an electrode driving substrate that supplies a signal at the time of data writing to the plasma display panel, and a ground plate disposed between the plasma display panel and the electrode driving substrate And a magnetic body is provided on the periphery of the surface of the ground plate facing the plasma display.

In the plasma display module of the present invention, when the magnetic material has a loss, the data electrode includes not only the inductance but also the resistance, and a part of the energy of the current flowing through the data electrode is converted into heat. hand,
The effect of suppressing radiation of electromagnetic waves is further increased.

Preferably, a cable for supplying the data writing signal from the electrode driving substrate to the plasma display panel is provided, and the cable is connected to a magnetic layer and a mutual layer formed on the surface of the magnetic layer. A plurality of parallel signal lines; and a ground layer formed on the entire back surface of the magnetic layer. In this case, the degree of freedom in the cable arrangement structure increases.

More preferably, the electrode drive board has an electrode drive IC for supplying the data writing signal to the cable on a surface opposite to the ground plate, and the electrode drive IC and the cable Are provided in an inner layer, and the wiring pattern is sandwiched between a pair of grounded ground layers. In this case, a stray capacitance is generated between the wiring pattern and the pair of ground layers, and the stray capacitance reduces impedance due to high frequency. Therefore, the high-frequency current easily flows to the ground side, the current flowing into the data electrode is suppressed, and the radiation of the electromagnetic wave is reduced.

A plasma display module according to the present invention has a plurality of scan electrodes and a common electrode arranged between substrates facing each other and extending in a row direction, and a plurality of data electrodes extending in a column direction. In a driving method of a plasma display panel in which display cells are arranged in a matrix at respective intersections of the scan electrode, the common electrode, and the data electrode, the plurality of data electrodes are extracted in a predetermined order and each of the plurality of electrodes is extracted. It is configured as a group, and data writing to the display cell corresponding to an arbitrary scanning electrode is performed while sequentially driving the respective electrode groups.

In the plasma display module according to the present invention, for example, after driving an odd-numbered electrode group composed of odd-numbered data electrodes, a period between the driving of the odd-numbered electrode group and the next driving is performed.
An even-numbered electrode group consisting of even-numbered data electrodes is driven. In this case, when the odd-numbered electrode group is driven, the even-numbered electrode group is maintained at the same potential as the ground, and when the even-numbered electrode group is driven, the odd-numbered electrode group is maintained at the same potential as the ground.
A reverse image current flows through the electrode group adjacent to the electrode group being driven. This makes it possible to effectively suppress the emission of electromagnetic waves due to the high-frequency current on the data electrodes.

[0025]

The present invention will be described in more detail with reference to the drawings. FIG. 1 is a perspective view showing a color PDP in a first embodiment of the present invention in a partially cut-out state.
FIG. 2 is a cross-sectional view taken along a plane A in FIG. 1 and viewed from above.

As shown in FIGS. 1 and 2, color PDP
1 has a front glass substrate 2 and a rear glass substrate 3 facing each other. The front glass substrate 2 has a scanning electrode and a common electrode (both electrodes are denoted by reference numeral 4) arranged in a screen horizontal direction (row direction) on a surface facing the rear glass substrate 3. The rear glass substrate 3 is the front glass substrate 2
And data electrodes 5 arranged in the vertical direction (column direction) of the screen. On the surface of the rear glass substrate 3 opposite to the surface on which the data electrodes are provided, a ground electrode 6 is provided over the entire surface of the opposite side.

The ground electrode 6 does not necessarily need to be electrically connected to the ground of the color PDP drive circuit, but a larger radiation suppression effect can be obtained by the connection. In addition, the ground electrode 6 may have the same composition as the data electrode 5, the scanning electrode, and the common electrode (4).
It may be formed by metal sputtering or the like.

Here, the reason why electromagnetic wave radiation can be suppressed by the configuration of this embodiment will be described. FIG. 3 shows the color P
FIG. 4 is a perspective view showing a state in which a high-frequency current 7 flows on a data electrode in DP. In driving the color PDP module, the highest electromagnetic wave radiation level is at the time of data writing. At the time of data writing, a high-frequency current 7 flows through each data electrode 5, and this current 7 generates electromagnetic wave radiation.

When the ground electrode 6 is provided near the data electrode 5, an image current 8 in the opposite direction to the high-frequency current 7 on the data electrode 5 is generated on the ground plane 6 by a mirror image effect. The electromagnetic wave generated from the image current 8 is inverted in phase with respect to the electromagnetic wave generated from the high-frequency current 7 on the data electrode 5 and acts to cancel the electromagnetic wave due to the high-frequency current 7. . The radiation suppression effect by the image current 8 is further increased by electrically connecting the ground electrode 6 to the ground of the driving circuit of the color PDP. It is preferable that the high-frequency current 7 on the data electrode 5 and the image current 8 on the ground electrode 6 flow as close as possible in order to increase the effect of suppressing electromagnetic wave radiation. Therefore, it is desirable that the thickness of the rear glass substrate 3 be as thin as possible.

Next, a second embodiment of the present invention will be described. FIG. 4 is a cross-sectional view showing a main part of the color PDP 1 in the embodiment. The color PDP 1 has a front glass substrate 2 and a rear glass substrate 3 facing each other. The front glass substrate 2 has a plurality of scanning electrodes and a common electrode (4) arranged in a row direction on a surface facing the rear glass substrate 3. The rear glass substrate 3 has a plurality of data electrodes 5 arranged in a column direction on a surface facing the front glass substrate 2.

A plurality of band-shaped ground electrodes 9 having a width equal to or slightly wider than the data electrodes 5 are provided on the surface of the back glass substrate 3 opposite to the surface on which the data electrodes are provided, in parallel with the data electrodes 5. Have been. Each strip-shaped ground electrode 9
Need not be electrically connected to the ground of the color PDP drive circuit, but a larger radiation suppression effect can be obtained by the connection. In this configuration, the image current induced in each of the strip-shaped ground electrodes 9 is applied to the data electrodes 5.
It will flow parallel and in the opposite direction to the high frequency current flowing above. For this reason, the image current acts so as to cancel the electromagnetic wave caused by the high-frequency current, so that the electromagnetic wave radiation is totally suppressed.

The ground electrode 9 does not necessarily have to be planar, and is arranged in a direction that does not impede the flow of the image current induced by the ground electrode 9, that is, the flow of the ground current, that is, as a linear electrode parallel to the data electrode 9. May be provided. However, in the case of a linear shape, the resistance value increases due to the narrow width of the ground electrode 9, and the image current decreases. Therefore, it is desirable that the width of the ground electrode 9 be equal to or slightly wider than the data electrode 5. Of course, even when the width is narrower than the data electrode 5, the effect of suppressing electromagnetic wave radiation can be expected.

It is desirable that the ground electrode 9 and the data electrode 5 are arranged as close as possible to exhibit the effect of suppressing the electromagnetic wave radiation caused by the image current. FIG. 5 is a cross-sectional view of a main part of a color PDP according to a second embodiment of the present invention configured to satisfy this condition. In the color PDP 1, the ground electrode 9 is embedded in the rear glass substrate 3 and is brought close to the data electrode 5, thereby increasing the amount of suppression of electromagnetic wave radiation from the current flowing through the data electrode 5. In this case, the ground electrode 9 may be arranged in parallel with the data electrode 5, and in order to maximize the radiation suppression effect, it is desirable to arrange the ground electrode 9 directly below the ground electrode 5 as shown in FIG. .

FIG. 6 is a sectional view of a color PDP module 10 according to a third embodiment of the present invention. The color PDP module 10 includes a color PDP 11, an electrode driving board 14, and a color PDP 11 and an electrode driving board 1.
And a ground plate 12 disposed between the first and second ground plates. The data writing is performed by supplying a high-frequency signal generated by the electrode driving board 14 to the data electrodes 16 arranged above and below the screen via the flexible cable 15. The magnetic body 13 is disposed on a portion of the ground plate 12 near the signal supply side of the data electrode 16, that is, on a surface of the peripheral portion of the ground plate 12 facing the data electrode 16. The magnetic body 13 may be provided not only on the peripheral edge of the ground plate 12 but also on the entire ground plate 12.

Next, the principle of suppressing electromagnetic waves caused by the high-frequency current flowing through the data electrode 16 with the above configuration will be described. FIG. 7 is an equivalent circuit of the data electrode 16 and shows how a high-frequency current flows during data writing.

Since the data electrode 16 has an open end, the high-frequency current flowing through the data electrode 16 has a large amplitude on the signal supply side and gradually decreases toward the tip, as shown by the broken line in FIG. Such an amplitude distribution is obtained. In a portion where the current amplitude of the data electrode 5 is large, the surrounding magnetic field strength is high. If a magnetic material made of a material having magnetic properties such as ferrite is provided at this position, an inductance is inserted in series with the data electrode 16. It becomes the same state as. For this reason, in the high frequency band, the data electrode 16
When the anticipation is made, the impedance increases and the current is suppressed, so that the radiation of the electromagnetic wave is reduced. When the magnetic material has a loss, the data electrode 16 includes not only the inductance but also the resistance, a part of the energy of the current flowing through the data electrode 16 is converted into heat, and the radiation suppressing effect of the electromagnetic wave is reduced. It becomes even larger.

FIG. 8 is a perspective view showing the color PDP module according to the third embodiment in a state where a part of the color PDP is cut away. The configuration described above is not only for the data electrode 16 but also for suppressing the high-frequency current flowing in the scanning electrode 17 and the common electrode 18 for generating a display discharge, as shown in FIG. Is also effective. The driving sources for the scanning electrode 17 and the common electrode 18 are located at the left and right ends of the screen. Therefore, by disposing the magnetic body 13 along the peripheral edge of the ground substrate 12, it is possible to suppress electromagnetic wave radiation caused by a high-frequency current flowing through the scanning electrode 17 and the common electrode 18.

FIG. 9 is a sectional view of a color PDP module according to a fourth embodiment of the present invention. Color PDP
Module 80 includes color PDP 11, data electrode 1
6, an electrode driving board 14, and a ground plate 12 disposed between the electrode driving board 14 and the data electrodes 16. The upper portions of the electrode driving board 14 and the data electrodes 16 are connected via a flexible cable 84, whereby the electrode driving board 14
The drive voltage is transmitted to.

FIG. 10 is a sectional view showing the flexible cable 84 in a state of being sectioned in a direction perpendicular to the signal wiring direction. The flexible cable 84 includes a magnetic layer 81.
And a flat structure including a plurality of mutually parallel signal lines 83 formed on the surface of the magnetic layer 81 and a ground layer 82 formed on the entire back surface of the magnetic layer 81. The signal line 83, the ground layer 82, and the magnetic layer 81 are all made of a material having flexibility (flexibility). The ground layer 82 is electrically connected to the ground plate 12 via the ground of the electrode drive board 14 (FIG. 9). Note that a laminate seal can be attached to the flexible cable 84 to strengthen the cable 84.

Next, the principle of suppressing electromagnetic waves caused by the high-frequency current flowing through the electrodes by the above structure is the same as the principle in the third embodiment. That is, in the flexible cable 84 close to the electrode drive board 14 where the current amplitude becomes large, a magnetic body made of a material having magnetic properties such as ferrite is provided, so that the inductance is reduced as in the equivalent circuit of FIG. When the data electrode 16 is seen from the power supply in the high frequency band, the impedance becomes high and the high frequency current is suppressed. When the magnetic material has a loss, the data electrode 16 includes not only the inductance but also the resistance, and a part of the energy of the current flowing through the data electrode 16 is converted into heat, and the effect of suppressing electromagnetic wave radiation is reduced. It becomes even larger.

FIG. 11 is a sectional view of a main part of a color PDP module 20 according to a fifth embodiment of the present invention.
The color PDP module 20 includes an electrode drive IC 22, an electrode drive board 21, a ground plate 29, and a data electrode 2
8 are included in this order. The upper portions of the electrode drive board 21 and the data electrodes 28 are connected to each other via a flexible cable 26.

The electrode drive board 21 is provided with a wiring pattern 23
And an upper ground layer 24a disposed on the front surface side of the wiring pattern 23, and a lower ground layer 24b disposed between the upper rear surface of the electrode driving substrate 21 and the ground plate 29. A signal at the time of writing data is supplied to the lower part of the surface of the electrode
An electrode drive IC for supplying data electrodes 28 of the PDP 27 is fixed.

FIG. 12 is a perspective view showing a part of the electrode driving board 21 with a cutout. The electrode drive board 21 is formed of a multilayer printed board having three or more layers, and supplies a signal supplied from an electrode drive IC 22 for writing data or emitting a screen to a data electrode 28 via a flexible cable 26. . A wiring pattern 23 wired on the inner layer of the electrode driving board 21 is located between the electrode driving IC 22 and the flexible cable 26, and the wiring pattern 23 is sandwiched between the upper ground layer 24a and the lower ground layer 24b. Have been. Upper ground layer 2
4a and the lower ground layer 24b are provided with a large number of via holes 25 arranged at positions not obstructing the arrangement of the wiring pattern 23.
Are connected to each other. One or both of the upper and lower ground layers 24a and 24b are
It is connected to the ground of the color PDP 27.

Next, the principle of suppressing electromagnetic waves caused by the high-frequency current flowing through the electrodes by the above structure will be described. FIG. 13 is an equivalent circuit of the data electrode 28, and shows how a high-frequency current flows at the time of data writing.

Since the data electrode 28 has an open end, the high-frequency current flowing through the data electrode 28 has an amplitude distribution such that the amplitude is large on the signal supply side and gradually decreases toward the tip, as shown by the broken line. Becomes Therefore, the current distribution is large in the wiring pattern 23 in the inner layer of the substrate near the electrode driving IC 22 which is a signal supply source. In this position, since the ground layers 24a and 24b are provided in the upper and lower layers, a stray capacitance 29 is generated between the wiring pattern 23 and the ground layers 24a and 24b. Since the stray capacitance 29 lowers the impedance at high frequencies, the high-frequency current easily flows to the ground side, the current flowing into the data electrode 28 is suppressed, and the radiation of electromagnetic waves is reduced.

The above structure, similar to the third embodiment, is arranged not only in the data electrode 28 but also in the horizontal direction of the screen, so that the high-frequency current flowing through the scanning electrode and the common electrode for generating a display discharge respectively. It is also effective for suppression.

Next, a fifth embodiment of the present invention will be described. FIGS. 14A and 14B are diagrams for explaining a driving method according to the present embodiment. FIG.
(B) shows the timing of driving the data electrodes.

As shown in FIG. 14A, a color PDP
Has a plurality of scan electrodes 31 and a common electrode 32 disposed between a front glass substrate and a rear glass substrate (not shown) facing each other, and a data electrode 30.
The display cells 33 are arranged in a matrix at the intersections of 0, 31, and 32, and write discharge of data is performed on the display cells 33 to cause the display cells 33 to emit light.

The data electrode 30 alternately drives every other electrode group when writing data to the display cell 33 facing an arbitrary scanning electrode 31. For example, after driving the odd-numbered data electrodes,..., (Odd-numbered electrode group), the even-numbered data electrodes,. During this time,
The odd-numbered data electrodes are maintained at the same potential as the ground (FIG. 14B). When the odd-numbered data electrodes are driven, the even-numbered data electrodes are maintained at the same potential as the ground (FIG. 1).
4 (B)).

In the color PDP, data writing is performed by applying a negative voltage to one scanning electrode 31 arranged in the horizontal direction of the screen and applying a positive voltage to the data electrode 30 corresponding to the display cell 33 to emit light. This is done by applying.
By repeating this operation over all the scanning electrodes 31, data writing on the entire screen is performed.

In the driving method according to the present embodiment, in order to write data to the entire display cell corresponding to one scanning electrode 31, writing to the display cell 33 corresponding to the odd-numbered data electrode,. The negative voltage is applied twice, i.e., writing to the display cells 33 corresponding to the even-numbered data electrodes. This operation is repeatedly performed on all the scanning electrodes 31 to write data to the entire screen, and then a display is discharged by applying a voltage between the scanning electrodes 31 and the common electrode 32.

Next, the reason why the driving method according to the present embodiment can suppress the electromagnetic wave radiation caused by the data electrode 30 will be described. In this driving method, the data electrodes 30 are alternately driven between every other electrode group. Therefore, when driving a certain data electrode 30, for example, a data electrode, the data electrodes existing on both sides of the data electrode 30 exist. , Are at ground potential. Therefore, an image current in the opposite direction flows to the adjacent data electrode, and the radiation caused by the high-frequency current on the driven data electrode can be canceled.

In the driving method according to the present embodiment, the plurality of data electrodes 30 are divided only into the odd-numbered electrode groups and the even-numbered electrode groups, and the two electrode groups are alternately driven. However, the present invention is not limited to this. , The data electrodes 30 extracted in this order can be configured as a plurality of electrode groups, respectively, and data can be written into the display cell 33 corresponding to an arbitrary scanning electrode while sequentially driving each electrode group. For example, data electrodes, and data electrodes, and data electrodes,
And are each configured as an electrode group, and data electrodes,.
, The data electrode, and the data electrode are sequentially and repeatedly driven. In this case, when the data electrodes are driven, the data electrodes are maintained at the ground potential, when the data electrodes are driven, the data electrodes are maintained at the ground potential, and when the data electrodes are driven, , Will be maintained at ground potential. Thereby, the radiation of the electromagnetic wave caused by the high-frequency current on the data electrode 30 is effectively suppressed.

In the above specific example, each electrode group is configured such that two data electrodes are sandwiched between the data electrodes. However, the number of electrodes sandwiched between specific data electrodes can be further increased. At this time, for example, when driving with n (where n is a natural number) data electrodes interposed between specific data electrodes, data is written to the display cells 33 belonging to one scanning electrode 31. Requires n + 1 application of negative voltage. Therefore, in order to speed up the data write operation, it is preferable that n is smaller.

As described above, according to the first to fifth embodiments of the present invention, in order to suppress the electromagnetic wave generated from the PDP itself, the housing or the filter is arranged outside the PDP to obtain the electromagnetic shielding performance. Therefore, the entire PDP device can be manufactured at low cost. In addition, to reduce the electromagnetic wave radiation energy in the plasma display module, there is no need to reinforce the electromagnetic shielding performance of the housing or the filter where the electromagnetic shielding performance is weak. In addition, the manufacturing process can be simplified.

As described above, the present invention has been described based on the preferred embodiments. However, the plasma display panel, the plasma display module and the driving method of the present invention are not limited only to the above embodiments. A plasma display panel, a plasma display module, and a method of driving the plasma display panel in which various modifications and changes have been made from the above-described embodiment are also included in the scope of the present invention.

[0057]

As described above, according to the plasma display panel, the plasma display module and the driving method of the present invention, the electromagnetic wave generated from the PDP itself is suppressed while the radiation level of the electromagnetic wave is effectively reduced. No casing or filter is required, and the entire PDP device can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 shows a color PDP according to a first embodiment of the present invention.
FIG.

FIG. 2 is a sectional view of a color PDP in the first embodiment.

FIG. 3 is a perspective view for explaining an operation in the first embodiment.

FIG. 4 shows a color PDP according to a second embodiment of the present invention.
FIG.

FIG. 5 is a sectional view showing a modification of the color PDP in the second embodiment.

FIG. 6 shows a color PDP according to a third embodiment of the present invention.
It is sectional drawing which shows a module.

FIG. 7 is a schematic diagram for explaining an operation in the third embodiment.

FIG. 8 is a perspective view showing a color PDP module according to a third embodiment.

FIG. 9 shows a color PDP according to a fourth embodiment of the present invention.
It is sectional drawing which shows a module.

FIG. 10 is a sectional view showing a cable used for a color PDP module according to a fourth embodiment.

FIG. 11 shows a color PD according to a fifth embodiment of the present invention.
It is sectional drawing which shows a P module.

FIG. 12 is a partially cutaway perspective view showing an electrode driving substrate used in a color PDP module according to a fifth embodiment.

FIG. 13 is a schematic diagram for explaining an operation in the fifth embodiment.

FIGS. 14A and 14B are plan views for explaining a method of driving a color PDP according to the fifth embodiment, wherein FIG. 14A shows an arrangement of data electrodes, and FIG. 14B shows a timing chart for driving data electrodes;

FIG. 15 is a cross-sectional view showing a main part of a conventional color PDP.

FIG. 16 is a cross-sectional view showing a main part of a conventional color PDP.

17A and 17B are views for explaining a conventional color PDP device, in which FIG. 17A is a perspective view showing a housing structure, and FIG. 17B is a cross-sectional view showing a state cut along a cut surface C in FIG. is there.

FIG. 18 is a cross-sectional view showing a main part of a conventional color PDP.

[Explanation of symbols]

 1, 11, 27: color PDP 2, 41: front glass substrate 3: rear glass substrate 4: scanning electrode, common electrode 5, 16, 28, 30: data electrode 6, 9, 29: ground electrode 7: high frequency current 8: Image current 10, 20, 80: Color PDP module 12: Ground plate 13: Magnetic body 14, 21: Electrode drive board 15, 26, 84: Flexible cable 17, 31: Scanning electrode 18, 32: Common electrode 22: Electrode drive IC 23: Wiring pattern 24a: Upper ground layer 24b: Lower ground layer 25: Via hole 33: Display cell 81: Magnetic layer 82: Ground layer 83: Signal line

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[Procedure amendment]

[Submission date] September 24, 1999 (1999.9.2)
4)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claim 2

[Correction method] Change

[Correction contents]

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] Claim 3

[Correction method] Change

[Correction contents]

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yoshizumi Sekii 5-7-1 Shiba, Minato-ku, Tokyo F-term within NEC Corporation 5C040 FA01 GA03 GB03 GB14 GB20 GC11 GC20 GH09 GK05 GK07 GK12 GK14 LA13 LA18 MA08 MA14 MA22 MA26 5C094 AA21 AA44 AA60 BA31 EA10 FB12 GA10

Claims (10)

[Claims] 1. A first and a second substrate facing each other, a plurality of scanning electrodes and a common electrode disposed on the first substrate in a row direction, and disposed on a column direction on the second substrate. A plurality of data electrodes, and a display cell disposed at each intersection of the scan electrode and the common electrode and the data electrode,
A plasma display panel for performing a data write discharge on a display cell to emit light from the display cell, wherein a ground electrode is provided on the second substrate. 2. The data electrode of claim 2, wherein the plurality of data electrodes are formed on a surface of the second substrate facing the first substrate, and the ground electrode is formed on an entire surface of the second substrate opposite to a surface on which the data electrodes are formed. The plasma display panel according to claim 1, wherein the plasma display panel is formed. 3. The plurality of data electrodes are formed on a surface of the second substrate facing the first substrate, and the ground electrode is formed on a surface of the second substrate opposite to a surface on which the data electrodes are formed. And a plurality of strip-shaped ground electrodes respectively parallel to the data electrodes.
The plasma display panel according to item 1. 4. The plasma display panel according to claim 3, wherein the plurality of strip-shaped ground electrodes are formed inside the second substrate. 5. The data electrode, wherein the ground electrode comprises:
The plasma display panel according to any one of claims 1 to 4, wherein the plasma display panel has the same composition as the scan electrode or the common electrode. 6. The plasma display panel according to claim 1, wherein the ground electrode is made of a conductive sheet including a copper foil. 7. A display cell is arranged in a matrix at each intersection of a plurality of row electrodes and a plurality of column electrodes provided between mutually opposing substrates, and data write discharge is performed on the display cells. A plasma display comprising: a plasma display panel that emits light; an electrode driving substrate that supplies a signal for writing data to the plasma display panel; and a ground plate disposed between the plasma display panel and the electrode driving substrate. In the module, a magnetic body is provided on a peripheral portion of a surface of the ground plate facing the plasma display, wherein the magnetic body is disposed. 8. A cable for supplying a signal at the time of writing data from the electrode driving substrate to the plasma display panel, wherein the cable is parallel to a magnetic layer formed on a surface of the magnetic layer. The plasma display module according to claim 7, further comprising: a plurality of signal lines; and a ground layer formed on the entire back surface of the magnetic layer. 9. The electrode driving board according to claim 1, wherein the electrode driving board has an electrode driving IC for supplying the data writing signal to the cable on a surface opposite to the ground plate.
9. The plasma display module according to claim 7, further comprising: a wiring pattern connecting the cable and the cable in an inner layer, wherein the wiring pattern is sandwiched by a pair of grounded ground layers. 10. A semiconductor device comprising: a plurality of scanning electrodes and a common electrode disposed between substrates facing each other and extending in a row direction; and a plurality of data electrodes extending in a column direction. In a method of driving a plasma display panel in which display cells are arranged in a matrix at each intersection of an electrode and the data electrode, the plurality of data electrodes are extracted in a predetermined order, and each of the plurality of data electrodes is configured as a plurality of electrode groups. A method of writing data to the display cells corresponding to the scan electrodes of (a), (b), while sequentially driving the electrode groups.